My mobile's home screen was replaced

A

AC Question

Hi,

I got a new mobile and bought a new Virgin sim card. I cannot remember from when, my home screen was replaced. Now it looks like this:

Virgin
19:57
TUESDAY,31 JANUARY
Did you just sign in?
Update Google Play services
Recommended recent uploads
System update is ready

At the bottom, I found a lock icon with "Swipe up to unlock"

How can I stop that??
 

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